Power Electronics
In forward blocking mode of a thyristor

  Junction J1 and J2 is in forward bias and J3 is in reverse bias.
  junction J3 is in forward bias and J1, J2 is in reverse bias.
  Junction J1, J3 is in reverse bias and J2 is in forward bias.
  junction J2 is in reverse bias and J1, J3 is in forward bias.

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Power Electronics
Dynamic equalizing circuit is used for

 equal division of current through each thyristor in series.
  equal division of voltage across each thyristor.
 equal division of current through each thyristor in parallel.
 equal division of voltage across each thyristor in parallel.

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